package com.itheima.riggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.itheima.riggie.common.BaseContext;
import com.itheima.riggie.common.R;
import com.itheima.riggie.domain.ShoppingCart;
import com.itheima.riggie.service.ShoppingCartService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.time.LocalDateTime;
import java.util.List;

@Slf4j
@RestController
@RequestMapping("/shoppingCart")
public class ShoppingCartController {
    @Autowired
    private ShoppingCartService shoppingCartService;

    @PostMapping("/add")
    public R<ShoppingCart> add(@RequestBody ShoppingCart shoppingCart){
        log.info("购物车数据:{}",shoppingCart);
        //设置用户id,指定当前是哪个用户的购物车
        Long currentId = BaseContext.getThreadLocal();
        shoppingCart.setUserId(currentId);
        Long dishId = shoppingCart.getDishId();
        LambdaQueryWrapper<ShoppingCart> queryWrapper=new LambdaQueryWrapper<>();
        queryWrapper.eq(ShoppingCart::getUserId,currentId);
        if (dishId!=null){
            queryWrapper.eq(ShoppingCart::getDishId,dishId);
        }else {
            queryWrapper.eq(ShoppingCart::getSetmealId,shoppingCart.getSetmealId());
        }
        //查询当前菜品是否在购物车内
        ShoppingCart cartServiceOne = shoppingCartService.getOne(queryWrapper);
        if (cartServiceOne!=null){
            //已存在 , 加 1
            Integer number = cartServiceOne.getNumber();
            cartServiceOne.setNumber(number+1);
            shoppingCartService.updateById(cartServiceOne);
        }else {
            //不存在 创建
            shoppingCart.setNumber(1);
            shoppingCart.setCreateTime(LocalDateTime.now());
            shoppingCartService.save(shoppingCart);
            cartServiceOne = shoppingCart;
        }

        return R.success(cartServiceOne);
    }









    @GetMapping("/list")
    public R<List<ShoppingCart>> list(){
        log.info("查看购物车...");
        LambdaQueryWrapper<ShoppingCart> queryWrapper=new LambdaQueryWrapper<>();
        queryWrapper.eq(ShoppingCart::getUserId,BaseContext.getThreadLocal());
        queryWrapper.orderByAsc(ShoppingCart::getCreateTime);
        List<ShoppingCart> list = shoppingCartService.list(queryWrapper);
        return R.success(list);
    }

    @DeleteMapping("/clean")
    public R<String> clean(){
        //SQL:delete from shopping_cart where user_id = ?
        LambdaQueryWrapper<ShoppingCart> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(ShoppingCart::getUserId,BaseContext.getThreadLocal());

        shoppingCartService.remove(queryWrapper);
        return R.success("清空购物车成功");
    }

    @PostMapping("/sub")
    public R<ShoppingCart> sub(@RequestBody ShoppingCart shoppingCart){
        log.info("减1操作 {}",shoppingCart);
        Long currentId = BaseContext.getThreadLocal();
        shoppingCart.setUserId(currentId);
        Long dishId = shoppingCart.getDishId();
        LambdaQueryWrapper<ShoppingCart> queryWrapper=new LambdaQueryWrapper<>();
        queryWrapper.eq(ShoppingCart::getUserId,currentId);
        if (dishId!=null){
            //当前是菜品
            queryWrapper.eq(ShoppingCart::getDishId,shoppingCart.getDishId());
        }else {
            //当前是套餐
            queryWrapper.eq(ShoppingCart::getSetmealId,shoppingCart.getSetmealId());
        }
        ShoppingCart shoppingCartServiceOne = shoppingCartService.getOne(queryWrapper);
        if (shoppingCartServiceOne.getNumber()==1){
            shoppingCartServiceOne.setNumber(0);
            shoppingCartService.remove(queryWrapper);
        }else {
            shoppingCartServiceOne.setNumber(shoppingCartServiceOne.getNumber()-1);
            shoppingCartService.updateById(shoppingCartServiceOne);
        }
        return R.success(shoppingCartServiceOne);

    }


}
